| 摘要 |
PROBLEM TO BE SOLVED: To provide countermeasures for preventing any unlocking of a reclining lock mechanism caused by the collision load of a cargo or the like without any deformation of the reclining lock mechanism itself, or without applying any change of a complicated mechanism to the inside of the reclining lock mechanism.SOLUTION: In a reclining lock mechanism 4a on the in-cabin side, a shaft end side of a working shaft 6 to be connected to a connection shaft 5 is formed as a plate-like part 60 of the predetermined thickness, both side faces 50, 51 opposing each other of the connection shaft 5 are fitted in a cylinder in a substantially V-shaped manner opposite to each other, ridge sides of one substantially V-shaped upper ridge 51a and the other substantially V-shaped lower ridge 50b with the plate-like part 60 of the working shaft 6 being abutted thereon form engagement parts of the working shaft 6. The connection shaft 5 and the working shaft 6 are connected to each other via a connection structure in which spaces to be kept on the ridge sides of one substantially V-shaped upper ridge 50a and the other substantially V-shaped lower ridge 51b different from those of the engagement parts form idling areas 52a, 52b of the working shaft. |
